Combined gear and winding drum



Nov. 28, 1944. TEMPLEMAN 2,363,757

COMBINED GEAR AND WINDING DRUM Filed Aug. 20, 1942 4 Sheets-Sheet 1 1944 P. TEMPLEMAN 2,363,757

COMBINED GEAR- AND WINDING DRUM Filed Aug. 20, 1942 4 Sheets-Sheet 2 I 7: k o in J j /grpmm' 94 J. P I'EMPLEMAN 57 I COMBINED GEAR AND WINDING DRUM Filed Aug. 20, 1942 4 Sheets-Sheet 3 i 5 E E Ill] 9 EE===E=ES Z 6 Nov. 2 1944.

J. P. TEMPLEMAN 2,363,757

COMBINED-GEAR AND WINDING DRUM Filed Aug. 20, 1942 4 Sheets-Sheet 4 .42 Z k 43 Z6 J f J5 j 97 1 20 K 4a. 1 J 30 Q :70 I I; .J0 J2 J3 l] J3 J7 .Z 720622 07': JEMF 79flsmz."

Patented Nov. 28, 1944 i UNITED STATES PATENT OFFICE 2,363,757 COMBINED GEAR AND WINDING DRUM John P, Templeman, Chicago, Ill. Application August 20, 1942, Serial No.455,465 8 Claims. (01. 254-149 My invention relates to a combined gear and winding drumfor use particularly inhand brakes of a combined gear and winding drum in which the chain is wound on the drum with the links at angle of approximately 45 to the vertical, so that each link is supported by the winding drum throughout the major portion of its length,

thereby preventing anylrolling of thechainland insuring uniformity of action throughout the entire operation of the windingtmechanism.

In the provision of winding mechanisms for use inrailway car brakes, various types of chain winding drums'have been employed. In these handbrakes it is necessary to provide awinding surface of comparatively small circumference, andpreferably concentric, so that the winding is uniform and of such a character that the chain being wound thereon will not roll, pile or slip, thereby resulting in serious accident and possibly death to a trainman. In theo-peration of railway brakes it is necessary to provide substantially the same power through the use of hand mechanism on the brake push rod asis exerted i in the ordinary air brake. The force required of the hand brake mechanism is, therefore, around 4,000 pounds, so thehand brake mechanism must be capable of exerting great force, must be exceedingly strong and sturdy, and must be able to Withstand a force much greater than this indicated amount, from a safety factor standpoint, so that the problem of-winding a chain composed of comparatively short, heavy links around a drum of small circumference has been a major problem in securing proper operation; of these hand brakes ever since power brakes were installed upon freight cars.

Various types of winding mechanisms have been employed, such as plain cylindrical surfaces, in which there is of necessity a slighttwist in the chain as it is wound around the drum; drums provided with circumferential channels in the face thereof to receive the vertically positioned links of the chain and tov support the alfan ternate links at their sides, usually by afcircular surfaceiof comparatively smalldiametery and winding drums-having a-plurality-of flat faces with channels in which the links, are

, supported in the channel and at the sides All of such winding mechanisms, howevenri have proven more or less unsatisfactory in service, due

to a number of reasons, the chief one of whichlis the inability to support the links of the chain duringthe windingoperation so that they do not bend in service; thereby ultimately resulting in fractures or brokenlinks, which necessitate frequent inspection, and always with the possibility of the chain breaking during the application of a brakeythereby releasing thebraking mechanism and throwing the trainman from the top ofacar.

Another factor is exceedinglyimportant in that the force applied to the handwheel of the braking mechanism must be uniform, because trainmen are called upon to apply brakes under varying'loadconditions, For instance, they may have a single car which is empty and in anothercase a singlewcar, may have a;heavy load therein. In

a other instances a ,stringof cars'may be coupled together and controlledby'; a singletrainman,

with the cars being all loaded or mixed with loads and empties, so that-the: application of brakes under these conditions must be under the con-, trol of the trainman at all times to secure the best results from the hand brakes. It is obvious;

of course, that with a single emptycar a braking force of lesser degree is-needed than for a loaded car, and if thebrakeman ,does not. have within his power means for applying, the power uniformly and regularly, under all of the conditions named above, the brakeis not suitable for instalf lation in railway car service. 1 if Another and further object of my invention is winding surface Werein a single plane, and affording a winding member having sufficient winding surface thereon} to accommodatemore than the usual length of chain required in installations of this character. I i A Another and further object of, my invention the provisionof a combined: gear and winding drum of small diameter foraheavychain; in whichthe bending stresses are distributed over greaterareas than :wliathasc been the practice I 55 heretoforewhere thelstress'are'as of the links are Figure 1 is a wide perspective view of a combined gear and Winding drum, with the wheel shown turned at approximately 240 from its normal unwound position; I

Figure 2 is a view similar to Figure 1, except somewhat more narrow, showing the wheel at approximately 180 from its. normal unwound position;

Figure 3 is a View similar to Figure 1, with the the pin 25, said pin being held in placeby a cotter pin 29. The pin 25 is positioned at an angle of approximately 45 to the axis of the hub l8 and at an angle of approximately 45 to the verical plane of the wheel, and extends through the first link of a chain so that the link is canted at Wheel shown turned to a position of approximate- Figure 4 is a perspective view of a combined gear and winding drum in its normal unwound position; 3

Figure 5 is a perspective view of the wheel and winding drum with the chain wound thereon in approximately the same wheel position as shown in Figure 2;

Figure 6 is a. perspective view of the. combined wheel and winding drum in wound up position; and- Figure '7 is a viewwith the chain inposition on the winding drum in approximately the same position as the wheel shownin Figure 2.

Referring now particularly to the drawings and in which like reference characters'refer to like parts throughout, a wheel In is'shown hav-" ing a rim portion II onthe outer periphery of which gear teeth l2, [2 are formed. A flange I3 is provided integrallyformed with the rim porv tion H, and extends entirely around the wheel.

, A plurality of spaced spokes l4, l5, l6 and 11 are provided integrally formed with the rim portion H and flange I 3-. of the wheel,- and extend inwardly therefrom to a hub l8. The hub l8-has a shaft opening l9'therein to receive a shaft upon which the wheel rotates in its normal operation,

with the hub l8 extending through the gear wheel on each side thereof and forming at oneside of the wheel a winding drum to receive the links of a chain as it is wound thereon. Achain receiving channel extends in a spiral direction about the hub l8, this channel being defined by the'spokes and lowwebs ofmaterial on the side of the channel-adjacentth wheel'and by an outwardly extending flange of variable height integrally formed with the hub I8 adjacent the outer end thereof. A- web 2| is providedyinte grally formed at one of its ends with the flange l3-and merges into the spoke l5 at its opposite chain from rolling or in any wise'slipping as'it is end. A cam surface 22 is provided onthe web member 2|, which surface is angularlydisposed A lug 23 is formed on the under side of the web 2| adjacent its point of attachment with the flange l3, with arflat surface 24 thereon and an opening therein to receive a pin- 25. The pin'25' is mounted in-a lug 2B integrally formed with the hub lit-and thespoke l4, the'lu-g 26 having an opening 21 therein to receive the pin 25, and having axflat surface 28. parallel with the face :24" on the lug 23. The :opening 21 is in.alignment withra. recess in the lug .23-,.to..receive:one end'lofi' an angle of approximately 45 both with respect to the plane of the wheel and to a plane parallel with the axis of the hub l8. s

A chain, designated as a whole as 30, is provided, this particular length of chain comprising nine links, each link being approximately 3 inches long, 2 inches wide, and made of material fs of an inch in diameter, with the drum providing a'winding surface which will take up the entire length of the chain amounting to approximately 16 inches.

Link A of the chain is secured to the wheel within the plane thereof by a pin extending therethrough, and is supported by the faces 24 Y and 28 of the lugs 23 and 26, and also rests upon the hub 18 on the opposite side of the-wheel from the winding surface. The link A is mountedat an angle of 45 to both thehorizontal and vertical, so that as the chain is Wound'aroundthe drum the other links maintain substantially. the same 45 angle bothiwith respect to thehori zontaland vertical. Pockets are provided, aswill be hereinafter described in detail, around the periphery of the hub I8, in such manner that along each of their sides for substantially the entire length of each link of the chain,.thereby preventing the chain .from bending .under: the tremendous'force andstresswhich are placed upon the chain, and .likewise preventing the wound'about the drum.

The link B of the chain 30, when inwound position, is supported by an inclined face 3! .on the spoke I5 at one side .and by surface 32 on the hub l8 which is. inclined forwardly of the lug '26 and rib 33, and by the wall portion 34 .of the flange 20 at its other side. The link B isguided into this position by the cam surface 22 during theinitial winding ofthe chain on the drum.

Link C isSuppOrted at one side by surface 35 on the hub l8and low web 36 at the bases of the spokes l5 and I6, and by surface 31 on the inner tion and supported at each of its sides throughout the major portion, of their length; Thelma jor.-portion of all bending stresses to which link.- 7

C, and also all the other links OfIthBflhfiil'lrIlOfmally used, is subjected, is not-onlyf transferred. to the winding drum, but is distributed-over supporting surfaces to suchan extent-jthatlbendingg or breaking of the links is prevented, which is not the case where thebending stress is concentrated. in a small area-of both link and drum.

LinkD at one side is supportedby asurface 39-formedat one side of a fillet-40 of metal cast integral with the hub l 8 and the spoke l6,; and at its other side by a surface-4| on thein-npr? faceof awall 42 forming .a portion of the-flange 20, the contourof the surfaces 39. and 4 h being; similar to-the surfaces- 35 and 31 hereinabove described.

Link E at one sidexis supported-bye:surfaceq 43 011 the inner side of a wall '44 forming pa part 0f th flange 2 k and ta-its other side the ilinlo E is-supported by a surface 45formedbyT alow web 46 connecting the base of the spokeslli andll and the surface of the hub l8, the surfaces of the recesses 43 and 45 conforming in sur-,

face contour to the described. l r I I Link F at one Of itspsides is supp rted by a. surface 41 formed on afillet 48 at thebase of similar recesses hereinbefore spokel-l" and hub l8, and at its opposite side we. surface 49 formedonthe hub l8 and a wall 50 forming a part of the flange 20. The surface contour .of the recesses 41 and 49 are similarto the surfaces 39 and 4|, whereby the link F is supported throughout the major portion of its length 'afleach of its sidesQwhilepositioned at an angle forming in contour to the outer sides of the linlc G 'and beingof sufficient length to supportthe link throughout the major portion of 'itslength. Y

Link H is supported on one of its sides by afs'urface 55 formedin the rib 33, and at its opposite side by a surface 56 on the inner face of -a wall portion 51 forming apart of the flange extending around the end of the hub l8.

In normal operation the link H will not be wound upon the drum, but in cases where, because of wear in the parts, additional take-up may be necessaryl provide supporting surfaces f or it just the same as for the other links. In any event, theforce on this link M11 be more in a straight line direction than abending force and it isnot necessary that the surface 55 support somuch of the link. It Willbe noted also that this link H lies alongside link A and in substantial register with it, and the link I, which is securedto link H, is used merelyas a connecting member-to a brakerod, brake chain or other connecting member leading to otherparts of the brake mechanisms. a r a In operation, thecombined gear wheel and.

. drum'is mounted in a suitable housing, with the necessary gear and holding and release mechanism common to vertical power hand brakes, well known in the art, and which forms no part of the present invention. Assuming that the brake is placed in the usual position upon the. end of a car, the gear wheel is mounted with the chain attaching pin at the lower side and the chain hanging loosely therefrom, with its link I connected to a brake operating rod or to a chain leading to the brake operating mechanism secured to the bottom of the car. The gear wheel ID rotates in a counterclockwise direction and in its normal operations the first links are wound on the drum with little resistance, the initial rotation serving merely to pull the slack out of the various brake operating parts. The link A is mounted upon the pin in substantial alignment with the center of the spiral winding surface, that is, at a slight angle to the plane of the wheel, so that the pull thereon issubstantially in a straight line upon the pin 25. As the wheel rotates, the link B moves along on the cam surface 2! until it reaches thesurfaces tail, with each link being supported along each of its sides substantially for the length of the link.

T-h'ecdntour of the engaged surfaces is such that thereisno wedging of the links into these surfaces, but the links are fittedtherein accurately so thatwthere is no danger of the chain 'becoming fouled due to kinks thereinQnor canthe chain roll or slip in any way while it is being wound uponthedrumw r u Becauseof thefact that each winding is and must be exactly identical with the preceding winding, the pulling force exerted on the chain is uniform, enabling the trainman to make a steady and uniform application of the brake shoes to the wheels, and without any sudden release of the chain while the brakes are in par tially applied position, causingthe trainman .to

be pitched from his position on the car. Furthermore, because the. links are firmly fixed in position about the drum, there is no bendingor breaking of the links, and the windingmechanism' will last indefinitely and without the necessity ofconstant inspection to see that the winding mechanism is in proper condition for serviceable operation. H l

While Ihave described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto, as I con template changes in form and the proportion of parts and the substitution of equivalents as cir= cumstances may suggest or render expedient without departing from the spirit or scope of the appended claims.

What is claimed is: l l wl. Railway car brake chain winding means comprisingin combination; a gear wheel having teeth around its outer periphery and han elon- C gated hub portion having a winding surface thereon, and chain anchoring means on said Wheel whereby the end link of a chainis secured :to said gear wheelat an angle of approximately 45 ,to the vertical plane of the wheel, the said winding surface being composed of a series of pockets for receiving individual links of a chain, the saidpockets being progressively positioned toward the end of the hub portion whereby a chain is wound on said surface in a spiral manner.

2. A combined gear and winding drum having a hub portion forming a winding surface, for a chain, and a pin for attachment of the end link of a chain to the gear wheel at an angular position both with respect to vertical and horizontal positions, the hub having a flange thereon having seating surfaces conforming in contour to one side of the link of a chain, and provided with seating surfaces on the side opposite the flange, all of said seating surfaces supporting one side of a link of a chain throughout a portion of the length of each link.

.3. A comibned gear and winding drum comprising a toothed rim, a hub constituting a winding surface, spokes connecting the hub with the rim, thehub having a flange on its free end having link-receiving seats formed therein and having coacting link-receiving seats formed in the bases of said spokes and in webs connecting the bases of some of said spokes, and chain attachhaving 4 coactings link-receiving: seats formed in the- .bas.es of .-the. said spokes .and .in webs connecting the bases of some of.,-.said..spokes, and

chain attaching, means :on thesaid Wheel whereby,a. chain is. securedto thegsaid wheel with the links thereof at an: angle of. approximately 45-bothwto the plane of the wheel andto its axis of rotation.. p

5.-A=coinbined gear and winding drum com? .prising a toothed rim having a; flangeon the inner side thereof, a hub having a flange thereonzadjacent oneend thereof; spokes connecting the hub] with the said toothedrim; a web having a lugat one of .its ends intgerally formed with the said flangepand one ofthespokes having a 'camhsurface. on one, side'thereof, one of said spokes having a; lug. formed at the base thereof opposite the lug -on the saidweb, the said lugs having aligned openings'therein and having parallel faces at an angleof approximately 45 to the plane of the .wheel and to its axis of rotation whereby a-chain is Wound .on thedrum with. the links thereofrat angularpositions, and a pin in said." lugs, the. flange on the. hub having seats fashioned therein toreceive and support one side of a link of a chain, with cooperatingseats being formedat the base'of the spokes to receive the links of the chain :on the. side opposite the said flange.

6. A combined. gear and windingidrumcomprising a. toothed. rim having a flange onthe inner side. thereof, .a'hub having a flange thereon adjacent one end: thereof, spokes connecting'the hub with the said toothed rim a'web having a lug at one of the ends integrallyrformed. with the said-flange and onexof the spokes having a cam surface on one side thereof; one'of said spokes having, a lug formed at the base. thereof opposite the lug .on-the said web, the said lugs hav inglaligned openings therein and having-parallel faceszat an. angle of=approximate1y 45 to the plane of the wheel andito its axis of rotation whereby a chain is wound .on the drum with the links thereof at angular positions, and a pin in saidilugs, the flange on the hub:.having seats fashioned. therein to receive. andsupport one side ofla linkof a. chain, the bases ofz'some ofsaid spokesbieing connectedwithwebs and some'of porting thev links when the chain is-wound'about rll c eeses? z aidsspokesl having;,-fi1lets--.of metalat theinbases integrally; formed with the saidspokes and. the said hub, and ;having seats in the said fillets and said ;webs 1tosreceive one side-.of the'1inkS Of1a chain as itis wound llponthe said drum.

'7. Railway car Make chain winding;,means comprising incombination; a lgfiar wheel having teeth-,aroundits outer; periphery, a hub extending; axially 'of, the wheel, means, connecting the hub withqt he toothed periphery,gan, outwardly spaced flange on -,said=.hub whereby achain-receiVingphannel le -provided between the; said flange and-;themeans connecting th hub with the -toothed outer-periphery of the gear wheel, they said flange having supporting. surfaces for the; links of the chain, the hub and. the means connecting the hub with the toothed periphery adjacent the gear wheel having.- surfaces forthe links Tformed therein'complementary to the ,said surfacesiormedin the flange, said surfaces supsaid. hubin a manner whereby all of the links are disposedat an angle of approximately forty five degrees with respect to the axis of rotation, andchain anchoring means on the said gear wheel'for securing the end link of the chain theretov, A I

8..Railw.ay' car brake chain winding means comprising in. combination, a-gear wheel having teetharound its-outer periphery, a .hub extending axially. of the wheel, means connecting the said hub with the toothed periphery, a flange around. the outer end of the'hub providinga chain-receiving channel between the said flange andthe connecting means for the toothedrirn and the hub,seats formedin the said. flange at variable, radial distances from the axis of roan angle of approximatley 45 to the axis of rotation. offthe wheel, and chain anchoring means. on the said gear wheel whereby the .end

link of a chain is anchoredthereto. 

